Sundance doc examines real-life Close Encounter

Earth authorities are completely unprepared for the arrival of alien visitors and worried humans should ready themselves by watching a groundbreaking documentary, the film's director boasts.

Danish director Michael Madsen takes a tough line promoting "The Visit", which is subtitled "An Alien Encounter" and competing in the World Documentary category at the Sundance Film Festival.

Intriguingly, the movie is filmed from the perspective of the first alien arrivals -- with a series of experts and authority figures talking to the camera as if to welcome our new extraterrestrial friends.